Shaft coupler



FIG. 1 is a top plan view of the shaft coupler showing my new design;

FIG. 2 is a front perspective view thereof;

FIG. 3 is a front side elevational view thereof;

FIG. 4 is a partially rotated side elevational view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is an exploded front side elevational view thereof;

FIG. 7 is an exploded front perspective view thereof;

FIG. 8 is a partially rotated and exploded side elevational view thereof;

FIG. 9 is an exploded bottom plan view thereof; and,

FIG. 10 is a further rotated and exploded side elevational view thereof. 

I claim the ornamental design for a shaft coupler, as shown and described. 